Overview
Happy is a free, open-source mobile app that lets you control Claude AI from your phone with end-to-end encryption. It enables you to spawn and manage multiple Claude Code sessions in parallel, running on your own hardware. The tool works seamlessly from both your phone and desktop, integrating with your existing tools and workflow without disruption. It’s built around a CLI program, mobile app, and relay server that securely pass encrypted messages between your computer and phone.
Application scenarios
Mobile development control
Manage Claude Code sessions on your phone while away from your desk.
Multi-project management
Run separate Claude Code instances for frontend, backend, and DevOps tasks simultaneously.
Hands-free coding
Use voice commands to code, debug, and manage projects without touching a keyboard.
Remote collaboration
Start a session on your desktop and continue it from your phone or web browser.
Secure code review
Get smart push notifications when code is ready to review, keeping you updated on the go.
Terminal access on mobile
Use all Claude Code features (plan mode, custom agents) from your phone as if you were in the terminal.
Core features
End-to-end encryption
No one can read your messages or code, ensuring security across devices.
Multiple active sessions
Run several Claude Code instances simultaneously across different projects without losing context.
Smart push notifications
Get alerts when input is needed, code is ready to review, or something went wrong.
Real-time voice execution
Speak commands and watch them execute instantly—true voice-to-action, not just dictation.
Zero workflow disruption
Integrates with your existing tools, editors, and development environments without requiring changes.
Open source (MIT licensed)
Well-organized codebase makes it easy to contribute and has a friendly community.
Cross-platform access
Works on iOS, Android, and web, with a CLI program that runs on your computer.
Relay server architecture
A server connects your computer and phone, passing encrypted messages between them.
Target users
Happy is designed for developers and engineers who use Claude AI for coding and want to control it from their phone. It’s ideal for those managing multiple projects simultaneously, working remotely, or needing hands-free control via voice. Open-source contributors and teams seeking a secure, free alternative to other remote Claude Code tools will also benefit.
How to use
Start by installing the CLI program on your computer with npm i -g happy && happy . This launches a regular Claude Code session. Then, use the mobile app (iOS, Android) or web app to continue that same session from your phone. The CLI encrypts Claude Code activity and sends it to a relay server, which passes it to your mobile app for display. All display logic runs on your phone, keeping your computer’s terminal output accessible remotely.
Effect review
Happy delivers on its promise of a free, open-source mobile interface for Claude Code with strong security and voice control. User feedback on the site is positive, with one developer noting it “beats” other remote Claude Code tools like CodeRemote and YoloCode, and another praising its “huge UI jump” in recent updates. The real-world usefulness is clear: it solves the problem of managing Claude AI sessions from a phone without workflow disruption. For developers who need to stay productive on the move, Happy offers a practical, no-cost solution that integrates seamlessly with existing setups.
Frequently asked questions
What is Happy?
Happy is a free, open-source mobile app that allows you to control Claude AI from your phone with end-to-end encryption and a seamless workflow.
Is Happy free to use?
Yes, Happy is completely free and open-source.
Does Happy support end-to-end encryption?
Yes, Happy ensures all communications are protected with end-to-end encryption.
Can I use Happy with any AI model?
Happy is specifically designed to control Claude AI.
Is Happy available for both iOS and Android?
As an open-source mobile app, Happy is available for both iOS and Android platforms.
Launch URL
https://happy.engineering/Tags
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